Disk-bearing.



PATENTED SEPT. 17, 1907.

3. E. DODSON. DISK BEARING.

APPLICATION TILED JULY22.1905.

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H. B. DODSON.

DISK BEARING. APPLICATION FILED JULY 22. 1905.

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PATENTED SEPT. 17, 1907. H. E. DODSON. DISK BEARING.

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UNITED STATES PATENT OFFICE.

HARRY E. DODSON, OF SPRINGFIELD, OI-IIO, ASSIGNOR TO P. P. MAST AND COMPANY, OF SPRINGFIELD, OHIO, A CORPORATION OF OHIO.

DISK-BEARING.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed July 22,1905. Serial No. $70,774:.

To all whom it may concern:

Be it known that I, HARRY E. DonsoN, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Disk-Bearings, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to disk bearings, or, in other words, to bearings for disks employed in agricultural implements, such as the furrow-opening disks of grain drills, foruse in connection with which latter my invention is more particularly devised, although capable of use in connection with other structures, such as harroW disks and the like.

It is the object of my present invention toprovide a simple and compact bearing, having ample bearing surfaces, so arranged as to effectually support the rotating parts both laterally and circumferentially.

To these ends my invention consists in certain novel features which I will now proceed to describe, and will then particularly point out in the claims.

In the accompanying drawings, Figure 1 is an elevation of a part of a grain drill embodying myinvention in one form, viewed from the convex side of the disk; Fig. 2 is a sectional view of the same, taken on the line at x of Fig. l and looking in the direction of the arrows; Fig. 3 is an elevation of the side of the structure oppo site to that shown in Fig. 1, showing the concave side of the disk; Fig. 4 is a sectional view, taken on the line y y of Fig. 1 and looking in the direction of the arrows; Fig. 5 is a detail perspective view of the bearing block, detached; Fig. 6 is a similar view of one of the disk hub members, which may be termed the outer member; Fig. 7 is a similar view of the other disk hub member, which may be termed the inner member; Fig. 8 is an elevation of the inner face of the support, with the disk and bearing block detached therefrom: Fig. 9 isan enlarged sectional view through the bearing, taken on the same plane as Fig. 2; and Fig. 10 is a detail perspective View of the dust-ring,-detached.

In the said drawings, I have shown my invention as applied to a disk furrow-opener for grain drills, and in the construction shown 1 indicates the drag bar, and 2 a suitable disk support, which also carries the ,grain conduit or boot 3, and a suitable scraper 4 for the convex side of the disk.

5 indicates the disk which is of the usual concaveconvex type, and which is set, as usual, at an angle to the line of draft, with its concave face forward, and with the seed conduit or boot 3 on its convex side and to the rear of the center of the disk, which is connected to the support lying on said convex side by the hearing which 1 have devised, and which I will now proceed to describe, premising that it is one of the objects of my invention to locate this bearing between the disk and support, so that the concave side of the disk shall be practically free from any projecting parts, while the bearing is so constructed as to bring the disk close to the support and boot and at the same time afford ample bearing surfaces within this laterally constricted space.

6 indicates as a whole a bearing block detachably connected to the support. To this end the support is provided with an aperture 7, through which passes a screw bolt or tap bolt 8, which is threaded into an aperture 9 in the center of the bearing. Provision is made for so engaging the bearing block with the support as to prevent its rotation when the connecting screw bolt is being operated to connect or disconnect the parts, and for this purpose I prefer to provide upon the bearing block projections 10, which enter recesses 11 in the support, as shown more particularly in Fig. 2. In order to properly center the bearing block relatively to the support, I prefer to provide upon this latter an annular rib 1 2, which fits around the adjacent end of the bearing block, forming a seat to receive the same and hold it in position. The bearing block is preferably made somewhat tapering, as shown, having its circumferential bearing surfaces frusto-conical, rather than cylindrical. These circumferential bearing surfaces are two in number, and are indicated respectively by the reference numerals 13 and 14. The bearing block has a portion 15 lying adjacent to the support, and the bear- .ing surface 13 is formed by a part of the block of greater diameter than the portion 15, thus forming between the two a shoulder 15, in a plane at right angles to the axis of rotation of the disk. The bearing surface 14 is provided upon the peripheral surface of a part of the bearing block of yet greater diameter than that which is provided-with the bearing surface 13, and this latter part of the bearing block is provided on its opposite sides with lateral bearing surfaces I6 and 17, these lateral bearing surfaces lying in planes at right angles to the axis of rotation of the disk. The bearing block is provided at its end adjacent to the disk with a recess 18, and the bottom wall of this recess is indicated at 19,

while the side wall of said recess forms an internal circumferential bearing surface 20. To cooperate with this bearing block, the disk is provided with a hub comprising two parts or members, indicated respectively by the reference numerals 21 and 22.

The disk is provided with a central aperture 23, and the outer hub member 21 is secured to the inner or convex side of the disk at the margin of said aperture, and lies wholly on the inner or convex side of the disk, adjacent to the support. This hub member 21 has a circumferential bearing surface 24, cooperating with the bearing surface 13 of the bearing block,

a circumferential bearing surface 25, cooperating with the circumferential bearing surface 14 of the bearing block, and a bearing surface 26, lying in a plane transverse to the axis of the disk and cooperating with the similar bearing surface 16 of the bearing block. The inner end of the hub member 21 terminates in a surface 27, which lies flush with the shoulder 15 of the bearing block and forms an annular extension of said surface. The outer edge of the hub member 21 is preferably rounded, as shown in Figs. 2 and 9, but if desired may be made angular, as shown in Fig. 6.

The inner hub member 22 has a marginal or flange portion 28, by means of which it is secured to the outer or concave face of the disk. The remainder of the inner hub member extends through the opening 23 at the center of the disk, and lies upon the opposite or inner side of said disk within the outer hub member 21. It has an annular portion 29, which fits the aperture 23 of the disk, and adjacent thereto it has a bearing surface 30, which cooperates with the bearing surface 17 of the bearing block, said bearing surface lying in a plane transverse to the axis of rotation of the disk. The inner hub member extends into the recess 18 in the end of the bearing block, and has an external circumferential bearing surface 31, which cooperates with the internal circumferential bearing surface 20 of the bearing block. The inner hub member terminates at 32, somewhat short of the bottom wall 19 of the bearing block recess, to permit the lubricant to pass freely between the Surfaces 32 and 19. The end of the inner-hub member is recessed on the side thereof adjacent to the bearing block, as indicated at 33, thus forming a lubricant chamber which Will be hereinafter referred to. Said inner hub member may also be centrally recessed, on its opposite face, as indicated at 34, to lighten the structure and reduce its cost. I

The two hub members are secured to the disk in any suitable way, as. for instance, by bolts or rivets 35, passing through both hub members, and through the disk adjacent to the central aperture thereof.

It will be observed that the hub members have both circumferential and lateral bearings on both sides of the bearing block. In other words, the hub of the disk has circumferential bearings on the bearing block both internally and externally, and it also has lateral bearings on opposite sides of said bearing block in planes transverse to the axis of rotation of the disk,

The hub members have a double circumferential bearing on the bearing block, external as to the block and internal as to the hub, and a single revcrsely arranged circumferential bearing, internal as to the block and external as to the hub. In the case of the lateral bearings, there is a bearing surface to receive the thrust of the disk due to the pressure of the soil against it, and a reverse thrust bearing to prevent axial movement of the disk in the opposite direction. Thus ample and efiicient bearing surfaces are provided, and at the same time the arrangement is such that the bearing occupies a relatively small space laterally, or in the direction of the axis of rotation of the disk. This enables me to locate all of the bearing surfaces on the inner or convex side of the disk, between the disk and support, thus leaving the concave or working face of the disk practically free from any project ing parts, while I am at the same time enabled to bring the disk close to the support and boot, with the bearing thus located, without impairing the efficiency of the bearing.

36 indicates a dust guard, in the form of a ring or annulus, mounted on the part 15 of the bearing block and adapted to seat against the surfaces 15* and 27 of the bearing block and outer hub member, against which said ring is held by a spring 37, coiled around the part 15 of the bearing block and abutting against the support at one end and against the ring 36 at its other end. The support 2 is provided with a flange 38, which encircles the adjacent end of the bearing block at the top and front thereof, so as to protect the same from dust and dirt. The dust guard 36 is provided with a projection 39, extending from the outer wall thereof across the space between the dust guard and the flange 38 which, by its contact with the end 40 of the flange 38, will prevent said dust guard and spring from being carried around by the rotation of the disk. By means of this dust guard and flange, the entrance between the bearing surfaces of any dust or other detrimental substance is effectually prevented, since the only entrance for such material into the bearing is effectually protected by these devices, and its location is moreover such that it is but slightly exposed.

In order to provide an efficient lubrication for the hearing, I form or mount upon the top of the support a lubricant cup 41, threaded at its upper end to receive a screw plug 42, by means of which the lubricant may be forced out from the cup to the bearing, said screw plug also serving as a closure for the cup. A lubricant conduit 43 extends from the cup to the in ner face of the support, where it registers with a passage or aperture 44, extending longitudinally through the bearing block 6 and terminating in the lubricant chamber 33. The engagement of the pins 10 of the bearing block with the recesses 11 of the support insures the proper registering of the passages 43 and 44, and the lubricant distributes itself from the lubricant chamber 33 to the various bearing surfaces of the bearing in an obvious manner.

It will be noted that the disk proper does not carry any of the bearing surfaces, and is in no way subjected to wear, being simply clamped between the two hub members, which latter carry all of the rotating bearing surfaces which cooperate with the non-rotating bearing surfaces formed on the bearing block.

I do not wish to be understood as limiting myself to the precise details of construction hereinbefore de scribed and shown in the accompanying drawings, as it is obvious that these details may be varied without departing from the principle of my invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is l. The combination, with a support, of a non-rotating bearing block detachably connected therewith, a disk having a central aperture, and a hub secured to said disk and comprising an outer member secured to one side of the disk and an inner member secured to the other side of the disk and extending through the aperture thereof, and engaging said bearing block on the opposite side of said disk the bearing block being held between said hub members and lying wholly on one side of the disk, substantially as described.

2. The combination, with a support, of a non-rotating bearing block detachably secured thereto and provided with internal and external circumferential bearing surfaces and oppositely disposed lateral bearing surfaces, a disk. and a disk hub comprising an inner and an outer member provided respectively with internal and external circumferential bearing surfaces to cooperate with the corresponding bearing surfaces of the bearing block, said hub members having oppositely disposed lateral bearing sur faces to cooperate with the corresponding lateral bearing surfaces of the bearing block, said block fitting and being held between said hub members, substantially as described.

3. The combination, with a support, of a non-rotating integral bearing block secured thereto and having a plurality of annular bearing portions of successively increasing diameter and providing oppositely disposed circumferential bearing surfaces and oppositely disposed lateral bearing surfaces, a disk, and a disk hub comprising two members secured to opposite sides of the disk, one of said members being provided with circumferential bearing surfaces to cooperate with those-on one side of the block and with a lateral bearing surface engaging the block on one side on one of its lateral bearing surfaces, the other member being provided with a circumferential bearing surface to cooperate with the circumferential bearing surface and a lateral bearing surface engaging the lateral bearing surface of the block on the other side thereof, substantially as described.

4. The combination, with a support, of a non-rotating bearing block detachably secured thereto, having a plurality of annular bearing portions of successively increasing diameter and provided with external circumferential bearing surfaces and a lateral bearing surface, and having a recess at its larger end provided with an internal circumferential bearing surface, and a lateral bearing surface oppositely disposed to the first mentioned lateral bearing surface, a disk having a central opening, and a disk hub com prising an outer and an inner member attached to opposite sides of the disk, the outer member having internal circumferential bearing surfaces and a lateral bearing surface to cooperate with the corresponding bearing surfaces on the exterior and one side of the block, the inner hub member extending through the opening in the disk and having an external circumferential bearing surface to cooperate with the internal circumferential bearing surface of the block, and a lateral bearing surface to cooperate with the corresponding lateral bearing surface on the other side of the block, substantially as described.

5. In combination, with a support, of a non-rotating bearing block detachably secured thereto and having a plurality of annular bearing portions of successively increasing diameter and providing circumferential bearing surfaces and oppositely disposed lateral bearing surfaces, a concavo-convex disk, and a disk hub comprising two members secured to opposite sides of the disk, one of said members being provided with circumferential bearing surfaces to cooperate with those of the block and with a lateral bearing surface engaging the block on one side on one of its lateral bearing surfaces, the other member being provided with a lateral bearing surface engaging the lateral bearing surface of the block' on the other side thereof, said block and all of said bearing surfaces lying wholly on the convex side of the disk between said disk and support, substantially as described.

6. The combination, with a support, of a non-rotating bearing block detachably secured thereto, having a plurality of annular bearing portions of successively increas ing diameter and provided with external circumferential bearing surfaces and a lateral bearing surface, and having a recess at its larger end provided with an internal circumferential bearing surface, and a lateral bearing surface oppositely disposed to the first mentioned lateral bearing surface, a concavo-convex disk having a central opening, and a disk hub comprising an outer and an inner member attached to opposite sides of the disk, the outer member having internal circumferential bearing surfaces and a lateral bearing surface to cooperate with the corresponding bearing surfaces on the exterior and one side of the block, the inner hub member extending. through. the opening in the disk and having an external circumferential bearing surface to cooperate with the internal circumferential bearing surface of the block, and a lateral bearing surface to cooperate with the corresponding lateral bearing surface on the other side of the block, said block and all of said bearing surfaces lying wholly on the convex side of the disk between said disk and support, substantially as described.

7. The combination, with a support, a non-rotating bearing block carried thereby and provided with a shoulder facing the support, and a disk having a hub embracing said bearing block and terminating flush with the shoulder thereof, of an annular dust guard mounted on the bearing block and fitting against the shoulder and hub end, and a spring mounted on the bearing block betweeuthe support and dust guard to hold the latter in position, substantially as described.

8. The combination, with a support, a non'rotating bearing block carried thereby, and a disk having a hub embracing said bearing block, of an annular dust guard mounted on the bearing block and closing the end of the bearing between the block and hub, and a spring'mounted on the bearing block between the support and dust guard to hold the latter in position, the support being provided with a guard flange extending around the top and front, and the dust guard being provided with a projection engaging one end of said flange to prevent rotation of the guard, substantially as described.

In testimony whereof, I affix my signature in presence of two Witnesses.

HARRY E. DODSON.

Witnesses E. 0. HAGAN, IRVINE MULLER. 

